Flat structure that is at least partially provided with a self-adhesive substance

Abstract

The invention relates to a flat structure that is at least partially provided with a self-adhesive substance, the latter being present on a first surface layer of the flat structure in the form of a plurality of geometric bodies. According to the invention, the surface of at least some of the geometric bodies is at least partially treated in such a way that the treated part of the surface has a lower degree of adhesion than the non-treated self-adhesive substance.

1. A self-adhesive construct comprising a sheet structure and a self-adhesive mass on at least a portion of said sheet structure, wherein on a first areal layer of the sheet structure the self-adhesive mass is present in the form of a multiplicity of deformable geometric structures of varying heights, and some of the geometric structures having the greatest height have been treated such that the treated part of the surface exhibits a lower tack than untreated self-adhesive mass exhibits, whereas some of the geometric structures having the lowest height have not been so treated. 
     
     
       2. The self-adhesive construct of  claim 1 , wherein the first areal layer of the self-adhesive construct is a carrier material, in the form of a rigid or elastic film, foam, woven, paper, knitted, nonwoven or gel carrier, a coating-material layer or a layer of an adhesive. 
     
     
       3. The self-adhesive construct of  claim 1 , which has a multilayer composite construction. 
     
     
       4. The self-adhesive construct of  claim 1 , wherein the geometric structures are polygeometric domes. 
     
     
       5. The self-adhesive construct of  claim 1 , wherein the self-adhesive mass is a hot-melt adhesive. 
     
     
       6. The self-adhesive construct of  claim 5 , wherein the hotmelt adhesive is based on A-B or A-B-A block copolymers or blends thereof, and phase A is principally polystyrene or its derivatives and phase B is ethylene, propylene, butadiene, isoprene or mixtures thereof. 
     
     
       7. The self-adhesive construct of  claim 1 , wherein the self-adhesive mass is present on the first areal layer with a coatweight of 5 to 400 g/m 2 . 
     
     
       8. The self-adhesive construct of  claim 1 , wherein the self-adhesive mass geometry on the first areal layer has been deactivated, relative to its projection area, to an extent of 15% to 75%. 
     
     
       9. The self-adhesive construct of  claim 1 , wherein some of the geometric structures have different shapes compared to other of the geometric structures. 
     
     
       10. The self-adhesive construct of  claim 1 , which in an adhesively bonded state comprises channels between the geometric structures of self-adhesive mass. 
     
     
       11. A method of bonding a self-adhesive construct comprising increasing the tack of the self-adhesive construct in stages to effect a bond between the self-adhesive construct and the substrate, wherein said increasing is brought about by applying a first pressure to the self-adhesive construct and thereafter applying a second pressure to self-adhesive construct, wherein the first pressure is less than the second pressure and where the self-adhesive construct comprises a sheet structure and a self-adhesive mass on at least a portion of said sheet structure, wherein on a first areal layer of the sheet structure the self-adhesive mass is present in the from of a multiplicity of deformable geometric structures of varying height, and some of the geometric structures having the greatest height have been treated such that the treated part of the surface exhibits lower tack than untreated self-adhesive mass exhibits, whereas some of the geometric structures having the lowest height have not been so treated.